https://www.polygon.com/fortnite/2018/7/12/17563660/fortnite-season-5-v50-patch-notes-guide-battlepass-vehicles-weekly-challenges-rifts-switch

The rifts in Fortnite’s sky that have brought items from the game’s world into our own have spread, and now characters from different times in history or ready to do battle. Season five is here, and with it come a variety of changes that invite exploration and even more conspiracy theories about what exactly is going on in the game.

“Viking ships, desert outposts, and ancient statues have appeared across the island,” the Fortnite team wrote in the official patch notes for season five. “Hop in an All Terrain Kart (ATK) with your squad and uncover all-new mysteries and locations that await.”